
The Flamer is required for one official campaign map ( SynTek Residential), but is often considered optimal for any map with a high risk of Parasite attacks. The movement speed of any Swarm who is burning is greatly reduced. Care should be taken, however, as the Swarm will often randomly flail around while in their death throes, hitting anyone who strays too close. While the Swarm are burning, they will often stop attempting to attack the player and their team members and will stagger around while burning. Parasites in particular are virtually almost instantly killed on contact, which gives this weapon its reputation.
The damage caused by the burn can kill a non-boss Swarm with the briefest of touches on Easy/Normal, with Hard/Insane enemies requiring further napalm showers to defeat.
While the damage indicated by its stat sheet is extremely low, this damage is deceptive.
The large area of effect as well as the extreme ammunition conservation when using very short puffs of flame allow this weapon to continuously guard the targeted arc against almost any Swarm threat, especially Parasites.
The Flamer is often considered to be the premier weapon to use while on point duty. Secondary fire consumes ammunition rather quickly. Friendly fire is particularly damaging if a marine is ignited and not quickly extinguished. Sustained fire results in inefficient ammo usage and is relatively weak. Secondary fire can quickly extinguish burning teammates and static fire hazards. Often kills weaker Swarm with a single hit (though not instantly).
Can burn multiple targets in a single burst. Great care must be taken to ensure the firing area is clear from friendly personnel, especially when used on the move. The M868 uses a highly pressurized napalm-based fuel and is capable of blanketing a wide area, causing any targets caught in the blast to burn for an extended period of time.